摘要
为了探明野生大鲵(Andrias davidianus)自然繁殖所需要的主要生态条件,给人工养殖条件下大鲵的自然繁殖提供生态学依据,对张家界国家级大鲵保护区境内野生大鲵的栖息繁殖洞穴进行生态学考察。对海拔、洞口的宽度与高度等10个生态因子进行定量观测和主成分分析,结果表明,影响大鲵选择繁殖洞穴的主要因子是海拔、洞口高度、洞底组成,以及洞穴中水的透明度、pH、流速、饵料丰度7个因子。对大鲵繁殖洞穴相连河段进行调查,发现多为山溪流。对繁殖洞穴中水的溶解氧、化学耗氧量、硫化物等5项主要指标进行检测,除硫化物外,其他指标多达到国家饮用水的水质标准,可见大鲵自然繁殖对洞穴与水质的要求较高。
In order to ascertain the main ecological condition for wild Chinese Giant Salamander＇ s （Andrias davidianus ） natural breeding and provide ecological basis for Chinese Giant Salamander＇ s natural breeding under artificial conditions, the breeding den of wild Chinese Giant Salamander in Zhangjiajie Giant Salamander State Reserve was investigated with observing and analyzing 10 ecological factors quantificationally and measuring the main water factors including dissolved oxygen（DO）, chemical oxygen demand （COD）, sulphide, total hardness and pH. The results also showed that that the main factors at the breeding den for Chinese Giant Salamander are the altitude, den high, bottom composition and diaphaneity, pH, velocity, food abundance of water. The measured results also showed that most of water quality index reach the state drinking water standard except sulphide. The natural breeding of Chinese Giant Salamander demands for high quality of den and water.
出处
《动物学杂志》
CAS
CSCD
北大核心
2007年第3期114-119,共6页
Chinese Journal of Zoology
基金
湖南省教育厅资助项目(No.06C648)
湖南省科技厅项目(No.06sk3055)
关键词
大鲵
繁殖
生态条件
洞穴
水质
Chinese Giant Salamander（ Andrias davidianus ）
Multiply
Ecological conditions
Habitual den
Water quality
